Chemical Vs. Physical Change Level 1

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What is a Chemical Change?

Back

A process where substances combine or break apart to form new substances, which cannot be reversed easily. Examples include burning, rusting, and cooking.

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What is a Physical Change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and crushing.

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What happens during a Chemical Change?

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New substances are formed, and the original substances cannot be easily recovered.

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What happens during a Physical Change?

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The substance may change form or appearance, but its chemical identity remains the same.

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Is burning wood a Chemical or Physical Change?

Back

Chemical Change, because it produces ash and smoke, which are new substances.

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Is melting ice a Chemical or Physical Change?

Back

Physical Change, because the ice can be refrozen back into water.

Front

What is rusting an example of?

Back

Chemical Change, as it involves the reaction of iron with oxygen to form iron oxide.

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What is color change an indicator of?

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It can indicate a Chemical Change, as seen in reactions like rusting or cooking.

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Is tearing paper a Chemical or Physical Change?

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Physical Change, because the paper can be reassembled.

Front

What is an example of a reversible Physical Change?

Back

Freezing and melting of water.